Hello,
Greetings for the day!
I’m an Independent Advisor and Microsoft user like you. I'm glad to help you regarding your clarification.
Could you please make sure if you have followed below steps to add a font downloaded for PowerPoint MAC?
On your Mac, do any of the following:
- In the Font Book app , choose File > Add Fonts to Current User. In the window that appears, double-click the font file.
- Drag the font file to the Font Book app icon in the Dock.
- Drag the font file to the Font Book window.
- Double-click the font file in the Finder, then click Install in the dialog that appears.
- When you install a font, Font Book automatically validates or checks the font you’re installing for errors. Font Book also checks for duplicate fonts.
- Now try to reinstall Office apps or PowerPoint
https://support.apple.com/guide/font-book/install-and-validate-fonts-fntbk1000/mac
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it
https://support.microsoft.com/office/0ee09e74-edc1-480c-81c2-5cf9537c70ce
Hope this information would be useful to you. Please feel free to get back if you need any additional info.
Thank you!
Ravikumar
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